Hi Andrew,
This option is not available on the GUI. From the CLI, enter the command "80211w-pmf 2" from the WLAN prompt.
Below is the example.
ruckus> en
ruckus# conf
You have all rights in this mode.
ruckus(config)# wlan test
The WLAN service 'test' has been loaded. To save the WLAN service, type 'end' or 'exit'.
ruckus(config-wlan)# 80211w-pmf
Enter the number,0:Disable,1:Optional,2:Required..
ruckus(config-wlan)# 80211w-pmf 2
The command was executed successfully. To save the changes, type 'end' or 'exit'.
ruckus(config-wlan)# end
The WLAN service 'test' has been updated and saved.
Your changes have been saved.
ruckus(config)# end
Your changes have been saved.